php-regexHow to use regex in PHP to match only digits?

Regex (regular expressions) is a powerful tool for matching patterns in strings. In PHP, you can use regex to match only digits with the \d character class.

Example code

$string = '123abc456';

if (preg_match('/\d/', $string)) {
    echo 'The string contains digits.';
}

Output example

The string contains digits.

Code explanation

• \d: This is the character class for digits.
• preg_match(): This is the PHP function used to match a regex pattern against a string.

Helpful links

• PHP preg_match() Function
• Regular Expressions Tutorial

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